diff options
| author | Kaiyen Chang <kaiyen.chang@intel.corp-partner.google.com> | 2020-12-05 12:15:06 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-12-08 16:56:00 +0000 |
| commit | 62d73b6be596303fde9d57b3862d0d7c786bc805 (patch) | |
| tree | 6a89e90ef47997c42a5415d850bfb16cf6c565fd /src/soc/intel/common/block | |
| parent | f99f589ea9df2aca92d8b322094a551f98c64b67 (diff) | |
soc/intel/common/gpio_defs: Add PAD_TRIG(OFF) in PAD_CFG_GPI_GPIO_DRIVER
Probabilistic interrupt storm is observed while kernel is configuring
the GPIO for SD card CD pin. The root cause is that the macro
PAD_CFG_GPI_GPIO_DRIVER isn't configuring trigger as PAD_TRIG(OFF).
The way GPIO interrupts are handled is:
1. Pad is configured as input in coreboot.
2. Pad IRQ information is passed in ACPI tables to kernel.
3. Kernel configures the required pad trigger.
Therefore, PAD_TRIG(OFF) should be added in PAD_CFG_GPI_GPIO_DRIVER
to turn off the trigger while pad is configured as input in coreboot
and then let kernel to configure the required pad trigger.
BUG=b:174336541
TEST=Run 1500 reboot iterations successfully without any interrupts
storm.
Signed-off-by: Kaiyen Chang <kaiyen.chang@intel.corp-partner.google.com>
Change-Id: Icc805f5cfe45e5cc991fb0561f669907ac454a03
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48302
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Diffstat (limited to 'src/soc/intel/common/block')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/gpio_defs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/gpio_defs.h b/src/soc/intel/common/block/include/intelblocks/gpio_defs.h index 422720b921..2d6f62a851 100644 --- a/src/soc/intel/common/block/include/intelblocks/gpio_defs.h +++ b/src/soc/intel/common/block/include/intelblocks/gpio_defs.h @@ -273,7 +273,8 @@ #define PAD_CFG_GPI_GPIO_DRIVER(pad, pull, rst) \ _PAD_CFG_STRUCT(pad, \ - PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_BUF(TX_DISABLE), \ + PAD_FUNC(GPIO) | PAD_RESET(rst) | \ + PAD_TRIG(OFF) | PAD_BUF(TX_DISABLE), \ PAD_PULL(pull) | PAD_CFG_OWN_GPIO(DRIVER) | PAD_IOSSTATE(TxDRxE)) #define PAD_CFG_GPIO_DRIVER_HI_Z(pad, pull, rst, iosstate, iosterm) \ |